I recommend breaking up large chips into multiple symbols rather than have one giant symbol that is unwieldy. Many reference designs for large chips wil alrady have done this, and I simply copy their style as closely as I can.
For multiple pins of the same net (such as many vcc and gnd pins), It was recommended to me to name them as:
when you encounter multiple pins with same name, use "name@pad" instead of
"name_number" in the schematic symbol. Eg "VSS@AB1" instead of "VSS_2".
Only the part in front of the @ will be visible in the finished symbol,
but you'll be able to pinpoint which signal goes to which name when
connecting the symbol and package later.
Eagle PCB
Eagle PCB is a relatively low price commercial PCB design suite that is very popular.
In addition to Cadsoft's own manual and tutorial, I've also learned from the book //Build Your Own Printed Circuit Board// by Al Williams.
Symbols
I recommend breaking up large chips into multiple symbols rather than have one giant symbol that is unwieldy. Many reference designs for large chips wil alrady have done this, and I simply copy their style as closely as I can.For multiple pins of the same net (such as many vcc and gnd pins), It was recommended to me to name them as:
"name_number" in the schematic symbol. Eg "VSS@AB1" instead of "VSS_2".
Only the part in front of the @ will be visible in the finished symbol,
but you'll be able to pinpoint which signal goes to which name when
connecting the symbol and package later.
Schematics
Layout